Changeable combination key lock



June 23, 1925. 1,543,447

E. W. MARVEL CHANGEABLE COMBINATION KEY LOCK Filed Jan. 5, 1922 5 Sheets-Sheet 1 FIG I 'INVENTOR: 633-) 216; '20

June 23, 1925.

I E- ,W. MARVEL CHANG EABLE COMBI NAT 1 ON KEY LOCK Filed Jan. 5. 1922 5 Sheets-Sheet 4 FIG/II Flam -F1a/W' v FIG/HZ FYGXI/Z FIG iNVENTOR: uy-.3 )ZW/ C W a.

June 23, 1925.

. E. W. MARVEL CHANGEABLE COMBINATION KEY LOCK Filed Jan. 5, 5 Sheets-Sheet 5 FIG. m

FIG. 22%.

' mm 3] .79 n

Patented June 23, 1925.

EDWARD; w nnm MARVEL, or, PHILADELPHIA, PENNSYLVANIA, ASSIGNORM BY Mn'sNn ASSIGNMENTS, T0 MOSLEE LOCK GOMIPANY, or GOVINGTON, KEN- TUGK'Y', A-co-RPo-n'A' gtoN on OHIO.

museum CO MBiNA'iIOliT are noon.

A n'ation xiieiiqa'xiua'ry 5, 162 2. serial in); same;

To all whom it may concern:

Be it known 'that I, VEEDWARZIQ)" WILLVEY" Marvin, a citizen of the United States' -residing at- Philadelphia, in the 'county' of Philadelphia and State: of Pennsylvan a have inventec'l a fc'ert'ain new and useful Improvement in Changeable Combination Locks, whereof the following is a specificaltion, reference b ing had to the accompanying drawings.

My invention relates to looks adapted for use in connection with safety deposit boxes and similar enclosures and of the" general character described in Letters -Paten t "of the United States 1,166,380 and 1,1 6 ,3 e1

granted to me December 28, 1915, to v'vlt,

locks normally requiring the use of both a guard key and a main key to enact each openingmovement of the lock. v v

Safety deposit boxes being successively leased to difi erent parties to ivhomthe lessor furnishes a main key adapted to open given peg when tlie'lockthereofis] partially operated a guard key in the possession of the lessor; the lessees's'ometimes failtomgturn the main keysat therexpiration of their leases and it is necessary to change thelo'cks before again leasing them; in order to ren-I der the boxes secure against unauthorized usel Moreover, even ifthe lessees return the main keys at the expiration of their leases, it is desirable to change the locks vhein ver the lessees of the boxes are changed to prevent the otherwise possible useof unauthorized duplicates of the keys which have been returned.

My present inventionrenderssuch a lock changeable as to the combinations of its tumblers, so that it may be adjustably set to be opened by different main keys In the latter respect, my prIsent invention is present invention differs from that disclosed in thelast namedLetters Patent, not only the specific'construction and arrangement of the mechanism'of the ,main lock,' but the provision of an auxiliary key lock, in such correlation with the main lock that it' is necessaryto unlock the auxilia'rylock to permit the' coinbinatioii (if the main look' I c g V I. r 7

' v relation, to/thereafter remain sub]ect to to be changed.

be r d y. han ed Without m ng t lock or otherwise disturbing its mechanen nblle rem i S j ct f p r tion' the ame guard key. In those re-I spects, present inventienre's e iiblts' vql b d nl m'y op i di e z pr ca oli Serial 349,939 for Letters Patent of the States However, my present in vention differs from that disclesedjn said application in that the auxiliary key lock above contemplated is' entirely concealed hin t e as n f the, m in lee and. operable through the guard key hole if the t e a -din th ft f nces engeg sthe main tumblers are v mounted for rotary movement, whereas the fences in the inven tio i i di's'closed in said application are mounted for rectilinear reeiproc'ation; so

thatftlie pres ntconstructionpermitsof a' lock elements. AS re n r 4 de c i ed, a y ,i ye bfi includes a series ofcounterpart pivoted tumblers; s ubjectto operation by riiaiiikeys',

g IX-1,; eaoh ofsaid tumblers hav ng a sectoral series of gear teeth at its: free end and being in;

depend Iitlyadjustableto differentpo si-tionslf of aicual engagement with-respect" to .a'

rotary fence; ea'ehof said fenees, being compact arrangement of the the form olf a e 1-. w11e 1 having a sectoral seriesof gear teeth arranged to mesh" ,With meg-eateeth on its tumbler; said fen ces having means continuously maintaining theni operative,Hposition, including a statieniarystud shaft upon which they are pivoted, but said main tumblers being adapted to be simultaneously disengaged from their rejspective fences by shifting; them, with the stud shaft upon which they are pivdtedj that shaft being fixed in a reciprocatory changegplate, normally preted fr n' ving, by th a x lia y 0 k so that when said fences ,arethus;di;sengaged, any, one of a' series of nainikeys may be in} i iedl nd h rr d 9 W p sa mai t niblers; into cooperative adjustment, W fihre- 'spect to; that key, andintoreenagement with said tences, butin a correspondingly changed invention, with its locking slide bolt in.

locked position.

Fig. II is a rear elevation ofthe lock shown in Fig. I, with its locking slide bolt in locked position.

Fig. III is an elevation of the right hand end of said look as shown in Fig. I, which is the left hand end of said look as shown in Fig. II.

Fig. IV is a front elevation of said lock shown in Figs. I to III inclusive, with its mechanism in the same locked position, but with the front cover plate removed to show the relative position of the elements of said mechanismwhich are normally concealed by said plate.

Fig. V is a front elevation of said look, similar to Fig. -IV, but showing the rotary key hub turned one-sixth revolution clockwise, which is the full extent of its move ment by the guard key, preliminary to the unlocking movement of said slide bolt, by the main key for which the mechanism has been adjusted. However, said key hub must be turned backward by the guard key to the position shown in Fig. IV, and said guard key withdrawn before said main key is inserted.

Fig. VI is a front elevation of said look. similar to Figs. IV and V, but showing said rotary key hub returned to the same position as in Fig. V, but by the main key for which it has been adjusted; so as to shift said locking bolt to its normal unlocked position, which is shown in Fig. VI.

Fig. VII is a front elevation of said look, similar to Fig. VI, but with the auxiliary lock unlocked to permit the combination to be changed. Such change is effectedby turning said rotary key hub, clock-wise, onesixth revolution, from its locked position shown in Fig. I, but by means of the auxiliary lock key inserted in the guard key hole of said hub, to unlock the auxiliary lock; said hub being then returned anticlock-wise, to the normal position shown in Fig. IV, by said auxiliary lock key, to permit the latter to bewithdrawn; and said key hub is then turned one-half revolution, from its. locked position shown in Fig. I, to not only retract said locking bolt but withdraw the pivoted main tumblers aforesaid,- to the position shown in Fig. VII, in which their sectoral series of gear teeth are disengaged fromthe sectoral series of gear teeth'of the rotary fences aforesaid.

Fig. VIII is a front elevation of said lock, similar to Fig. IV, but with the. combination of said tumblers changed by inserting a different main key in said rotary hub, while the latter is in the position shown in Fig. VII, and turnng it, anticlockwise, to sweep said main tumblers into cooperative adjusti'nent with respect to that key, and reengage them with said rotary fences, in the position shown in Fig. VIII; which is different from that shown in Figs. IV to VI inclusive. Fig. VIII alsoshows the auxiliary lock in its normal locked position as in Figs. I and IV to VI inclusive; so that Fig. VIII differs from Fig. IV only as to the position of said main tumblers.

Fig. IX is a vertical sectional view of said lock, taken on the line IX, IX in Figs. I and IV. Y

Fig. X is a vertical sectional view of said :l[ock, taken on the line X, X in Figs. I and Fig. XI is a plan sectional view of said lock, taken on the line XI, XI in Figs. I and IV.

on the line XII, XII in Fig. VII.

Fig. XIII is a side elevation of the guard 7 key of said lock.

Fig. XIV is an elevation of the main key for the auxiliary lock of a different I form from that shown in Fig. XVI; in illustration of the fact that my present invention is susceptible of variation in that re spect; so that the same series of main keys may be used with respectively different auxiliary lock keys; the latter, of course, being adapted to cooperate with correspondingly different tumblers.

Fig. XVIII is a front elevation of the locking bolt.

Fig. XIX is a front elevation of the change plate.

F ig. XX is a front elevation of one of the partition plates, which separate the g fences and main tumblers.

Fig. XXI is a front elevation of the auxiliary lock lever. '7

Fig. XXII is a front elevation of said look, similar to. Fig. VII, but on a larger scale, showing the auxiliary lock unlocked to permit the combination to be changed. Fig. XXIII is a front elevation of said look, similar to Fig. VIII, but on the same said hub 39 is bitted so as to sweep said tumblers 28 and the fences 24 connected therewith into such position as to hold all of said fences 24. with their gatings 22 in registry with said stump 21. Moreover, the guard lever 56, which is fulcrumed on the stud 57 which is in rigid relation with said casing 2, is provided with the spring 58 having its free end bearing upon said casing so as to normally present the detent arm 59 of said lever intoengagement with the shoulder 60 on said locking bolt 1., to detain the latter in the locked position shown in. Figs. I and IV, and means must be employed to release said guard lever 56 by manipulation of said guard key 52, as follows:

Said guard lever 56 has the stump 61 adapted to enter the gatings 62 of the guard tumblers 63 which are pivoted on the stud 6 1 which is in stationary relationwith said casing2, and said guard tumblers 63 are provided with respective springs 66 bearing at their free ends upon said casing 2 and tending to turn said tumblers upwardly into the position shown in Fig. IV in which position said tumblers 63 are stopped by their projections 67 encountering said stump 61. Said guard lever 56 has the arm 69 carrying the stud 70 which is adapted to be encountered by the releasing tumbler 71 which is also pivoted on said stationary stud 64 and provided with the spring 72 having its free end bearing upon said casing and tending to turn said releasing tumbler into the position shown in Fig. IV. It may be observed that when said guard lever 56. is turned into the position shown in Fig. V, its stud 70, is in position to be encountered by said releasing tumbler; so that said guard lever 56 may be released and restored to its normal position, (to detain said locking boltl as shown in Fig. IV,) by downward movement of said releasing tumbler 71, when the latter. is swept downwardly by said main key 53, turning said rotary hub 39.

Said guard key. 52 and main key 53 are used to manipulate said lock, asfollows:

The lock mechanism being in the position shown in Figs. I and IV said guard key 52 is inserted in said keyway 47 in' said hub 39 and the latter turned, clockwise, approximately, 60 degrees; the shape of said recess 11 in said locking bolt 1 being such as to permit such movement of the cam 40, without shifting said bolt 1. Said key52 is bitted so as to sweep said tumblers 63 into position to receive said stump 61 in their gatings 62 and to then turn said guard lever 56 into the. position shown in Fig. V, by the projecting bit 74 of said guard key 52, bearing upon the shoulder 75 of said guard lever 56. Thereupon, said hub 39 being returned to its normal position shown in Figs. I and IV, and said guard 28 and their respective fences 24 into posi- J tion to receive said stump 21 in the gatings 22 of said fences, thus permitting said cam 40, turning in said recess 41, to thrust said locking bolt 1 rearward to said unlocked position.

Reverse movement of said main key 53,

effecting anticlockwise turning movement of said hub 39, suffices to return said locking bolt 1 to the locked position shown in Figs. I and IV, without any other manipulation of the lock mechanismj However, when it is desired to change the lock mechanism to be operative by means of another main key; said auxiliary lock.

bolt 14 may be retracted by inserting the auxiliary lock key 77, shown in Fig. XVI, in the aforesaid guard keyway 47, and turning said hub 39 clockwise to the same extent that the guard key was turned, to wit, ap-I.

proximately 60 degrees; but only after said guard key has been manipulated, as above described. It may be observed that until the guard key 52 has been thus manipulated,

the detent arm 59 of the guard lever 56 is IOU engaged with the shoulder 60 on the locking bolt 1, as shown in Fig. IVibut such manipulation of the guard key 52 first sweeps I said tumblers 63 into position to receive said stump 61 in thelr gatings 62 and then turns said guard lever 56 to disengage its detent arm 59 from said shoulder 60 of the locking bolt 1 and lowers said arm 59 to the position shown in V, thus permitting the further manipulation of the lock mechanism by said auxiliary lock key 77,. as above contemplated. Said auxiliary slide. bolt 14 is arranged to be reciprocated by means of the auxiliary lock lever 80 which is fulcrumed upon the stud 81 fixed in said casing and has the spring 82 having its left hand end, shownin Fig. IV, rigidly. con-.'

nected with said casing 2, and its right hand free end bearing upon the crank pin 83 projecting from said lever; and thus tending to thrust said lever upwardly to the position shown'in Fig. IV. carries the bell crank latch 85 which is hung upon the pivot pin 86 projecting from said lever 80. In the position shown in Fig. IV, said latch 85 is prevented from Said lever 80 tilting in either direction by engagement with the. lugs 87 on said casing 2- extendi g e n its a ms 8. andiwa d .89 '1 of said latch --lever is rthns ni rmal-ly held ,in position gtO be engaged hyrt'heibit- 92 atatheuen-d of the auxiliary lock key -7 7 shown in Fig. XVI,1-so 'th3.-t",VVhGII -Sflld key 7:7 is inserted jirthe guard keyway A7 and turned as abovedescr-ibed, said al-atch is turned, jupon its-pivot 8 6, ;irom the -position sh0wn;.in Fig.- IV to the position .shown in Figs. VII and XXII,thus-thrustwing :87 as-.:sh0w11 iin .gs-- VII and X I.

whereupon, said mainek y-ibfi may beimanipnlated as ;ahove--described \toshift said locking bolt 1 from the 0ciked posit on :SIIQWII in Big. LV :to (the unlocked ;p0si;tion Eshown in Fig. V1, .but, thy continuing-th tnrni-ng movement of saidk'ey 53,-;Glockwise, to complete 'one half revolutioninad 01 istopping when iitaha tlllilliid K0118- third revolution, as normally, when nnleck- .ing said .bolt ;.1;;',s ai d' key 53, encountering the bearing .93 o'fwsaidwchange .=pla-te =12,

.thrusts the ,latter to the position shown 1 in Figs. VII and XXII, ;thusissh ng said stud shaft 9 away ifrom said zstnd shaft "6 and thereby disengaging .the entire group of isaid main tumbler-s28 1.fI' I fllfiil r spective fences -:-24, beca11se -.saivd.-tumblers :are

pivoted {upon said shaft 9 {and carried with .it. VIVhenthe teeth- ,27 ofsaidmain tnmhlers 28 iare thus disengaged -.,i; rom the teeth ,25 otsaid fences --.2et, .said tum b1ers are th-rnst downwardly, by {theirgrespective springs .35, into thewpiosition shown in Figs. .an-cl .XXII. in which the key sweep edges 360i :sa-idirimhlers 28 bear upon said rotary key hub 39. ,Thereupon, said main lteyway 41$ beingin registry withsaid notch; 50 in the key hub hearing-5.1, saidmain rkey'53-.may be withdrawn .and'the main keyqto which it is desired to adjustthedock-mechanism may be inserted insaid ikeyway- 4 8, .while the latter remains in theabnormal position lastabove described and which is shown in Figs.- VII. and XXII." Forinstance, the different .main key 5e, shown in. Rig; may be thusinserted and tnrned, anticlockwise, to firstsweep said main tumblers.np wardly into cooperative relation with. the hitsof said mainikey 54. andJthen carlgy them to the left, untilQtheteeth 27 ofsaidltumblers 28 are reengag-ed withthe teetl1,,25{o t said ,fences 24 him ,in the different position shown inFigs. VIII and XXIII. Such-re: engaging movement of: said ,tiimh1ers28 is effected by. said cam 40-on said key hubthrusting against the left hand side df said recess 41 in said lockingbolt il' intil'the. latter ,is. restored to the locked position shown in Fig..jI V ,;and aSinjFigs. VIII and XXIII for, idu ingittt latter portion Qf countes the e aizinggfleiefgsaid achange plate 12, best shown in Fig. XIX and carnies-jthe latter to gthe; left, s hit;ing-.it- ,f rom the' abnormal position shown in Figs. ,VII and:

XXII to the normal :position shown in Rigs. IV, VIIIa-nd XXIII. Tllhereupon, @saifd au iliary- ;lockb lt l t-is au matically rest red toits normal loc ed positio she warn .in'Eig. and .as shownin .E'ig. VIII. As said locking bolt 1 thus passesyto its locked-.po;siti0. ;;v i ep mits-ithe-de en (ar of sa l v :5 ,to rise -.i,n engasemen with i the bo t shoul 160,, unde pressiire shoulde r60 is hen 'mesen ed in kits-enigma forward position, shown in Fig. IV :Of course, whe saidt etentarm 591eftheignard lev l .6 is i e l weredi di ngaged -11Qs lever 5'6,i1s in po sition tobegencountered hyithe releasing-tumbler 7.1, and; the latt r; isswep dewnwardly by {the-key tnrni g-esaidgrot-fi iy hub, 39,-so asto thus .release-zsaldrguard glever 56 and permit it'to tilt-totits prjgina l po- 'sition' shown in Figl- ,IV. Said jfleverv 56-1128 the crank @pin :QG'Which, in such movement sa d, l ver, strikes the ga-rm 89 of the latch 85;, :tilts said latch upon its pivot 86;;505'33 .to disengage its .notch iil from said Jug- 87 ,and permits.the spring .82 (if Said-lever :80 .to uplift that ileverfia-nd .thesauxiliany lock bolt-14:.t0 its original IQCked:positiomshnwn iin .Eigs. 51V, VIII, and In other Words; the first movementof-the locking .bolt 1 .1 toits t-loeked ositiom shown in ;Figs. I v, VIII-and- XI III, after theitumbler changin mechanism has bee uti i ed vas above described, :causes the auxiliary dockin'g mechanism to aut matically ;1 'e turn to its normal lacked position to prevent any further change in thecombination of the lock :until the above specified'operation of the guardxkey 52 and change-key 77 is ef tested in the manner abovedescribed.

It is to be understood that in the--1 rnannerlast described, said lockilnechanism;may be adjustably changed to 1 cooperate withany one of a n-umerous seriesrof 'differentmain keys, said nkeys difiering from each other only in the arrangement of their bittings which cooperate with the main tumblers-1 8. Moreover, said lock mechanism, is susceptible of ;much greater variation by changing the auxiliarylock tumblers 63 and of course, providing auxiliary'liocl; keys in accordance therewith, one suchwkey, 97, being shown in Fig. XIUI diiferingzfrom'thezkey 77 above described which is-shown in Fig. XVI.

It is to be understood thatsaid lock casing. 2 is seen-red .with its front face against the inner .face of ;a:1' d0 o1;, or drawerfront. byv screws-,eittendingthrough ithe holes .98 in .said casing sodihat the .front of the lock; and said ,screW-s As which hold its {'CONQI" ,3

of the 3 spring .8 0. a d-. .erer, be ns esaid It is to be understood that I do not desire to limit myself to the precise details of construction and arrangement herein set forth, as it is obvious that various modifications'may be made therein without departing from the essential features of my invention as defined in the appended claims.

I claim: 7 1. In a changeable combination'key lock, the combination with a casing; of a locking bolt having a stump; a rotary key hub with a main keyway and a guard keyway; main tumbler mechanism arranged to detain and release said bolt in accordance with the position thereof, including a series of counterpart pivoted main tumblers, each having a sectoral series of gear teeth at its free end and each adjustable, at its free end, to change the combination; a series of counterpart ro- -tary fences having respective sectoral series of gear teeth arranged to mesh \vith'the gear teeth on sa1d respective main tumblers;

each of said fences having a gating adapted to receive said locking bolt stump; a change plate, carry ng said tumblers and movable "in said casing to disengage said tumblers from said fences and'permit said tumblers 'to be changed; guard tumbler mechanism arranged to detain and release said bolt in accordance with the position thereof, ineluding a guard lever having a detent arm arranged to detachably engage said locking bolt, and'having a portion adapted to 'be encountered by a guard key to disengage said detent arm from said locking bolt, and having a crank pin arranged to cooperate with auxiliary lock mechanism, and a series of pivoted guard tumblers arranged to hold and release said guard lever in accordance with the posit-ion thereof, and controllable by said guard key; auxiliary lockmecha nism, in said casing, including a reciproeatory bolt adapted to normally prevent movement of said change plate, a lever fulc umed in said casing, in cooperative relation with said auxiliary bolt, and a bell cranlrlatch pivoted to said auxiliary bolt le er and. having one arm extending in position to be operated by an auxiliary key, inserted in said guard keyway, to unlock said auxiliary bolt, and another arm adapted to engage said casing and hold said auxiliary bolt in unlocked position, subject to automatic release by said crank pin; said auxiliary lock bolt being movable by said auxiliary key, to release said change plate and permit the combination 1f said tumblers to be changed; hereby a guardkey'and main key are required to be successively inserted in the respective keyways in said hub to turn the latter to open the lock, and said main tumblers are pivotally adjustable with respect to said change plate, to change the lock, by manipulation of said auxiliary lock mechanism with an auxiliary lock key inserted in said guard keywa-y, to be operated by different main keys while subject to operation by the same guard key.

2. In a changeable combination key lock, the combination with a casing; of a locking bolt; a rotary key hub with a main keyway and a guard keyway; main'tumbler mechanism arranged to detain and release said bolt in accordance with th position thereof, including a series of pivoted main tumblers, each having a sectoral series of gear teeth at its free end and each adjustable, at its free end, to change the combination; a series of rotary fences having respective sectoral series of gear teeth arranged to mesh with the gear teeth on said respective main tumblers; a change plate, carrying said tumblers and movable'in said casing to disengage said tumblers from said fences and permit said tumblers to be changed; guard tumbler mechanism arranged to detain and release said bolt in accordance with the position thereof, including a guard lever having a crank pin arranged to cooperate with auxiliary lock mechanism, and a guard tumbler arranged to hold and release said guard lever in accordance with the position there of, and controllable by said guard key; auxiliary lock mechanism, in said casing, including a movable bolt adapted to normally prevent movement of said change plate, a lever in cooperative relation with said auxiliary bolt, a latch pivoted tosaid auxiliary bolt lever and extending in position to be operated by an auxiliary key, inserted in said guard keyway, to unlock said auxiliary bolt and another arm adapted to engage said casing and hold said auxiliary bolt in unlocked position, subject to automatic release by said crank pin; said auxiliary lock bolt being movable by said auxiliary key, to release said change plate and permit the tumbler combination to be changed; whereby a guard key and a main key are required to be successively inserted in the respective keyways in said hub to turn the latter to open the lock, and said main tumblers are pivotally adjustable with respect to said change plate, to change the lock to be operated by different main keys.

3. In a changeable combination key lock, the combination with a casing; of a locking bolt; a rotary key hub with a main keyway and a guard keyway; main tumbler mechanism arranged to detain and release said bolt in accordance with the position thereof, including a series of pivoted main tumblers, each having a sectoral series of gear teeth at its free end and each adjustable, at its free end, to change the combination; a series of rotary fences having respective sectoral series of gear teeth arranged to mesh withthe gear teeth on said respective main tumblers; a support for said tumblers, movable in said casing to disengage said tumblers from said fences and permit said tumblers to be changed; guard tumbler mechanism arranged to detain and release said bolt in accordance with the position thereof, including a crank arranged to cooperate with auxiliary lock mechanism, and controllable by a guard key; auxiliary lock mechanism, including a movable bolt adapted tonormally prevent movement of said support, a lever in cooperative relation with said auxiliary bolt, a latch pivoted to said auxiliary bolt lever and extending in position to be operated by an auxiliary key to unlock said auxiliary bolt and adapted to hold said auxiliary bolt in unlocked. position, subject to release by said crank pin; said auxiliary lock bolt being movable by an auxiliary key, to release said support and permit the tumbler combination to be ha e w eby a guard k y an a a key are requiredto be successively inserted in the respective keyways in said hub to turn the latter to open the lock, and said main tumblers are pivotally adjustable with e pe t w deh n e p a to change th lock to be'operated by different main keys. en a shang a l m na n y lock, tllGCOlllbll'ifilllOil with a casing; of a locking bolt mounted to reciprocate said casing; a tumbler mechanism arranged to detain and release said bolt in accordance with the position thereof and including a stud shaft laterally movable in'said casing; a series of sectoral gear tumblers, pivoted on said shaft; a stud shaft stationary in said casa series of sectoralgear fences pivoted on said stationary shaft; a rotary key hub in operative relation with saidbo'lt; auxiliary lock mechanism in said casing normally preventing disengagement of said tumblers from said fences and means said casing, arranged to be operated by an auxiliary lock key, inserted in said hub, tojrelease'said auxiliary lock mechanism and permit said tumblers to be disengaged from their fences to change the combination of said tumblers.

5. In a changeable combination key lock,

the'combination with a casing; of a locking bolt mounted to reclprocate 1n sa d cas ng;

a tumbler mechanism arranged to detain and release said bolt in accordance with the positionthereofand including a stud shaft laterally movable in said casing; a series of sectoral vgear tumblers, pivoted on said shaft a stud shaft stationary in said casing; a series of sectoral gear fences pivoted on said stationary shaft; a rotary key hub in operative relation' with saidbolt; auxiliary lock; mechanism normally preventing i ag m n of d trmbl r 'f iein S fences; and means, arrangedtobe operated by an auxiliary lock key, to release said auxand including a series of pivotedv sectoral gear tumblers; a series of pivoted Sectoral gear fences; a rotary key hub 1n. operatlve relation with said 'bolt; auxiliary lock mechanism in said casing normally preventing disengagement of tumblers from said fences; and means in said casingfarranged to be operated by an auxiliary lock key, inserted in said 'hnb, to release saidauxiliary 0 k mecha i m dpe m t s d umble tobe disengaged from'their fences to change the combination of said tumblers.

.7. In a changeable combination key lock, the combination with a casing of alocking b t m v n d ca a tum le m chanism arranged to detain and release said bolt in accordance with theposition thereof and including a series of pivoted sectoral gear tumblers; a series of pivotedsectoral gear fences; a rotary key hub in operative la io Wit Salt; ux ary ek mecha i n s d asin .ne mal Preven n disengagement of said tumblers from said fences; and means in said casing, arranged to e p a e y a aux y lf ekk y; 0 release said auxiliary lock mechanism and permit said tumblers to be disengaged from their fences to change the combination of said tumblers.

8. In a changeable combination key lock, the combination with a casing; of a locking bolt mounted to reciprocate in said casing"; a tumbler mechanism arranged to detain and release said bolt in accordance with the position thereof and including a stud shaft laterally movable saidcas'ing; a t y ea tm l r; p v 9 a dsha t; a stud shaft stationary in said casing; a rotary gear fence pivoted on said stationary ft; a Q a y k y ub in r a ve sl w tion with said bolt; auxiliary lock mecha i orm y Pre e in d e a em nt O said tumbler from said fence; and means arranged to be operated by an auxiliary lock key, inserted in" said hub, to release said aux ia y 109k m h nism n Permi said tumbler to be disengaged from said fenee c an e h re 'pqsiti h af- 1 a Changeable mbination key l k, the combination with a casing; of a loeking olt m n t iproeat iii aie'eas g"; a tumbler mechanism arranged to detain lease Sa be i a cqrd nce w he 9 5i; tion thereof and including a stud shaft a e ly mevable n a d casing; ar gear tumbler, pivoted on said shaft a stud shaft stationary in said casing; a rotary gear fence pivoted on said stationary shaft; a rotary key hub in operative relation with said bolt; auxiliary lock mechanism nor mally preventing disengagement of said tumbler from said fence; and means arranged to be operated by an auxiliary lock key, to release said auxiliary lock mechanism and permit said tumbler to be disengaged from said fence to change the relative position thereof.

10. In a changeable combination key lock, the combination with a casing; of a locking bolt movable in said casing; a tumbler mechanism arranged to detain and release said bolt in accordance with the position thereof and including a rotary gear tumbler; a rotary gear fence; a rotary key hub in opertive relation with said bolt; auxiliary lock mechanism in said casing normally preventing disengagement of said tumbler from said fence; and means in said casing, arranged to be operated by an auxiliary lock key, in serted in said hub, to release said auxiliary lock mechanism and permit said tumbler to be disengaged from said fence to change the relative position thereof.

11. In a changeable combination key lock, the combination with a casing; of a locking bolt movable in said casing; a tumbler mechanism arranged to detain and release said bolt in accordance with the position thereof and including a rotary gear tumbler; a rotary gear fence; a rotary key hub in operative relation with said bolt; auxiliary lockmechanism in said casingnormally preventing disengagement of said tumbler from said fence; and means in said casing, arranged to be operated by an auxiliary lock key, to release said auxiliary lock mechanism and permit said tumbler to be disengaged from said fence to change the relative position thereof.

12. In a changeable combination key lock, the combination with a reciprocatory looking bolt; of tumbler mechanism arranged to detain and release said bolt in accordance with the position thereof; a rotary key hub having a main keyway and a guard keyway; a reciprocatory and oscillatory change plate, movable to change the combination of said tumbler mechanism; an, auxiliary lock mechanism normally preventing movement of said change plate and including means operable by an auxiliary key inserted in said guard keyway to release said change plate; whereby a guard key and a main key are required to be successively inserted in the respective. keyways in said key hub to unlock said locking bolt, and that guard key, an auxiliary key, and that main key, are required to be successively inserted in said key hub to permit change of the combination of said tumbler mechanism.

13. In a changeable combination lock, the

combination with a movable locking bolt; of tumbler mechanism arranged to detain and release said bolt in accordance with the po sition thereof; a rotary key hub having a main keyway and a guard keyway; a change element, movable to change the combination of said tumbler mechanism; an auxiliary lock mechanism normally preventing moveruent of said changeelement and including means operable by an auxiliary key inserted in said guard key vay to release said change clement; whereby a guard key and a main l y are required to be successively inserted in the.respectivekeyways in said key hub to unlock said locking bolt, and that guard key, an auxiliary key, and that main key, are required to be successively inserted in said key hub to permit change of the combination of said tumbler mechanism.

14 In a changeable combination lock, the couibination with a movable locking bolt; of tumbler mechanism arranged to'det-ain nd release said bolt in accordance with the LOSltlOll thereof; rotary key hub; a change element, movable to change the combination of said tumbler mechanism; an auxiliary lock mechanism normally preventing movement of said change element and including means operable by an auxiliary key inserted in said key hub; whereby a'guard key and a main key are required to be successively inserted in said key hub to unlock said looking bolt, and that guard key, an auxiliary key, and that main key are required to be successively inserted in said key hub to permit change of the combination of said tumbler mechanism. v

15. In a changeable combination lock, the combination with a movable locking bolt; of tumbler mechanism arranged to detain and release said bolt in accordance with the position thereof; a rotary key hub; a change element, movable to change the combination of said tumbler mechanism; and an auxiliary lock mechanism normally preventing movement of said change element and including means operable by an auxiliary key inserted in said key hub. p

16. In a changeable combination key lock, the combination with a casing; of a locking bolt; a rotary key hub with a main keyway and a guard keyway; a guard lever having a crank pin arranged to cooperate with auxiliary lock mechanism; a guard tumbler arranged to hold and release said guard lever in accordance with the position there of, and controllable by a guard key inserted in. said guard keyway; auxiliary lock mechanism in said casing, including a movable bolt, a lever in cooperative relation with said auxiliary bolt, and a latch pivoted to said auxiliary bolt lever, extending in posi tion to be operated by a key inserted in said guard keyway, to unlock said auxiliary bolt,

and adapted to engage said casing and hold said auxiliary bolt in unlocked position, subject to automatic release by said crank pin. 17. In a changeable combination key lock, the combination with a casing; ofa locking bolt; a guard lever having a crank pin arranged to cooperate with auxiliary lock mechanism; a guard tumbler arranged to hold and release said guard lever in accordance with the. position thereof, and controllable by a key; auxiliary lock mechanism in said casing, including a movable bolt, a lever in cooperative relation with said auxiliary bolt; and a latch pivoted to said auxiliary bolt lever and extending in position to be operated to unlock said auxiliary bolt, and adapted to engage said casing and hold said auxiliary bolt in unlocked position, subject to automatic release by said crank pin. 18. In a changeable combination key lock, t 1e combination with a casing; of a locking bolt; a guard lever arranged to cooperate with auxiliary lock mechanism; a guard tumbler arranged to hold and release said guard lever in accordance with the position thereof, and controllable by a key; auxiliary lock mechanism in said casing, including a movable bolt, a lever in cooperative relation with said auxiliary bolt; and a latch extending in position to be operated to unlock said auxiliary bolt, and adapted to hold said auxiliary bolt in unlocked position, subject to automatic release by said guard lever.

19. In a change-able combination key lock, the combination with a casing; of a locking bolt; a guard lever arranged to cooperate with auxiliary lock mechanism; a guard tumbler arranged to hold and release said guard lever in accordance with the position thereof, and controllable by a key; auxiliary lock mechanism in said casing, including a lever, and a latch pivoted to that auxiliary lever, extending in position to be unlocked, and adapted to hold said auxiliary lock mechanism in unlocked position.

20. In a changeable combination lock, the combination with a casing; of a movable locking bolt; a tumbler arranged to detain and release said bolt in accordance with the position thereof; a reciprocatory and-oscillatory change plate, carrying said tumbler and movable to change the lock combination; an element stationary in said casing arranged to engage said change plate in one position of the latter; and means arranged to oscillate and thus release said change plate.

21. In a lock, the combination with a movable bolt; of a lever operatively connected with said bolt; a latch pivoted on said lever and arranged to detain said lever in unlocked position; and means arranged to release said latchand permit said bolt to be locked.

In testimony whereof, I have hereunto signed my name at Philadelphia, Pennsylvania, this 5th day of March, 1920.

EDWARD VVILLEY MARVEL.

Witnesses:

JOHN P. WEBs'rnR, C. F. LUTHY. 

